--- a/GNUmakefile.in
+++ b/GNUmakefile.in
@@ -8,7 +8,7 @@ subdir =
 top_builddir = .
 include $(top_builddir)/src/Makefile.global
 
-$(call recurse,all install,src config)
+$(call recurse,all install,src config contrib)
 
 docs:
 	$(MAKE) -C doc all
